#include <iostream>
#include <vector>
using std::cout;
using std::endl;
using std::vector;

void test0(){
    vector<int> nums{1,2,3};
    vector<int> nums2{3,8,9,7};
    vector<int> nums3{7,4,3,1,4};
    vector<vector<int>> Nums{nums,nums2,nums3};

    for(auto & num : Nums){
        cout << "&vector:" << &num << endl;
        for(auto & ele : num){
            cout << ele << " : " << &ele << "   ";
        }
        cout << endl;
    }
}

int main(void){
    test0();
    return 0;
}
